Stove.



v N0. 698,803. v

E. HICAHNE.

STVE. Appmmon mea Mal-[5. 1901.)

n wanton Zz/an?. Calzooize 3:7913 abme/13 YHE MORRIS PETERS Co., PHOTO-LIYHO.. WASHINGTON, BA 94 i Uli-1 l I l l r n f .l l. l 5 4 illlllll f @muuu No. 698,803. Patented Apr.29,'|9o2.

E. n. cAHooNE.

sovs.

(Application med Mar. 5. 1901.1

(No Model.)

2 Sheets- Shee't 2.

um y

. line A A ofFig. l.

UNITED STATES PATENT QEEICE.

EDVIN R. CAIIOONE, OF NENVARK, NEV JERSEY.

STOVE.

SPECIFICATION forming part 'of Letters .Patent No. 698,803, dated April 29, 1902.

' Application ined March 5,1901. sentira. 49.820. (roman.)

To (all whom, it muy concern:

Be it known that I, EDWIN R. CAHOONE, a` citizen of the United States, residing at Newark, in the 'county of Essex and State of New Jersey,v have invented new and useful Im'- provements in Stoves, of which the following is a specification.

This invention relates to improvements in d'owndraft heating-stoves for burning soft or Vbituminous coal, and has reference more especially to .that vclass of stoves wherein a .pendent air-duct is used 'to divide the fuelchamber to direct air through the bed of the fuel. Y f

The object of the present invention is to arrange an air heating and supply chamber on the-outside of the stove-casing at a point where it will be in the path of the ascending heat, whereby the air in andthe air going into said chamber will become highly heated..

A further object' of the invention is to provide special 'means for observing the condition of the fuelin rear of the air-duct and specicrm'eans whereby the air-duct shield may be readily and conveniently attached and detached.

Many otherl objects and advantages will become apparent in the .description to follow and will4 be' particularly pointed out in the claims. f

.- In'the drawings formin ga part of this specification, Figure lis a vertical section of my improved stove on thelineE E of Fig. 3. Fig.'2 is a cross-section of the same on the n Fig. 3 is a similar section on the line B B of Fig. 1. Fig. 4 is a transverse vertical section onthe line C C of Fig.

Fig. 5 is yanlenline D D of Fig.v 1.

The numeral 1 designates astove-casing of anydesiredshape bestadapted for the accommodation of the parts about to," be described.

2 indicates'the stove-top, and 4 the usual fluefor the escape of the products of coml bustion.

io divide the fuel-chamber, which directs the air as it is delivered above the fuel-bed down through the body of said fuel under the influence of the draft. The air-duct is curved to'fexpose the rear fiue to the operator from the front and is of the usual form, having spaced-apart tips 5rL within the lower end to o provide air-distributing means,a novel means being also employed to lock the shield 6 in position. The tips 5' have flanges 5b, which project beyond the edge of the air-duct, and on said iianges the shield 6 is seated. Secured to each sideof the shield is a rearwardlyprojecting hook-shaped lug G, engaging slots in the front wall of the'air-duct. To remove the shield, it is given-a slight lift, which raises the point of the hook up, so that when the shield is given a movement toward the front the hook will be drawn through the openings.

Bolts, rivets, and the like are therefore dispensed with in so far as the iixing of the shield to the duct is concerned.

The fuel-chamber is composed of a front grate 7, perforated side lining 8, rear wall 9, formed of perforated hollow pendent bars 10, and bottom or grate 1l. The sides 8 are preferably provided With vertical grooves and are set in from the wall of the easing 1 to form hot-air chambers 12, similar chambers being formed between thebars 10 and the rear wall of the casing. A hinged door 13 is located in front of the grate 7, and projecting through said door will be any suitable means for introducing to the lowerpart of the body of the fuel a supply of air, tubes 13n being shown in the drawings for this purpose.v

The feed-door 14 has secured to or formed with it on the inner side an air-chamber or superheater 15, having projecting therefrom a series of hollow tubular-shaped protuberances 416, provided with tapered tubes 17.

-When the door is closed, the superheater reg- IOO windows are provided adjacent the protuberances 16, so as to permit the operator to notethe partition 26 is to prevent an uneven distribution of heated air to the fuel. Y

Near each end of the air-supply chamber 25 are two pipes 29 and- 30, the former entering-the air-duct to introduce a supply of heated air thereto, and the latter pipes enter thechambers 18 to supply the superheater with air. Flues 12, on the outside of the casing 1, communicate with the ends of the air-supply chamber 'and the air-chambers 12, formed between theside linings S and the casing. Depending from a point near each end ofthe supply-chamber are pipes 31, which communicate with the space formed in the rear of the lining 9. Hence it will be seen that I furnish currents lof heated air to several different, points in the fuel-chamber from 'fa single. source,'making it a decidedly easy matter for the operator to control the admission of air to regulate the combustion.

In' rear of the stove are arranged a plurality of upwardly-extending auxiliary tlues 34, 35, and' 3G, all of which com mnnicate with a commingling-chamber 37. The middle l'lue 35 at itsl upper end is surrounded on three sides by i a wall 38 and is capable of being entirely surthe remaining auxiliary flues enter the upper i rear main flue and are at all times in direct `communication therewith.

In thepractical operation of my invention I prefer to place the stove in a fireplace 40, covering the upper portion so as to just permit the passage of the stove-pipe 4.

When fuel is placed in the fuel-chamber, the damper 39'is positioned to permit of a direct communication between said fuelchamber and the chimney. Likewise the dampers controlling the air introduced at the lower .front part of the mass of fuel is opened, introducing a direct air-current through the fuel-chamber to the chimney. As the fire progresses and the fuel gradually becomes incandescent the incoming air at the'bottom is regulated accordingly. So, also, are the dampers 28 in the air-supply chamber gradually opened to admit heated air, respectively, through the protuberances and pipes 17, the air-duct 5, the sides 8, and rear 9 of the fuelchamber. These dampers being opened, the fuel soon becomes incandescent, at which stage the main damper 39 is raised, or, in other words-,positioned to cut off the direct communication between the fuel-chamber and the chimney, necessitatingthe product-s of combustion taking a long tortuons passage before escaping to the atmosphere. XVith thedamper3f) so positioned the products of combustion are directed over the heated-air-suppl'y chamber and divided, part going down, respectively, the-lines 34 and 36, and again meet in the lowercommingling-chamber 37, and are directed in this mixed condition up through the middle ue 35 to the chimney.A

My purpose in setting the stove in a fireplace is to utilize as much as possible the heated air in the surrounding space. The space formed between the stove and the walls of the fireplace of necessity forms an airheating chamber, and the air therein having a natural tendency to rise will enter the open.- 'ings 27 in the air-supply. chamber, from whence it is directed,as before stated.v As the air enters the cha1nber25 it encounters the intense heat therein, made possible by the products of combustion passing over the walls of the chamber to the chimney.` Before the air reachesthe point whereit is intended to accomplish its mission it is again subjected to an intense heating-surface, in

that in its passageit is continuallytaking up the heat inthe Various dues. VThe conduits or flues are all so arranged as'to be incontact either directly or indirectly with the action of the intense heat inthe fuel-chamber. This is especially true of the air delivered from the air-duct and the superheater on the feed-door.

It frequently happens when burning soft IOO or .bituminous coal that a regulatedseries of currents of air be given the lower part. of the fuel, while the air ad rnitte'd above the fuel must not equal that delivered below. This applies moreparticularly when the fuel-chamber is filled to be left for a great-length of time, and for this purpose the damper 19 is It is evident I may, ifso desired,

provided. entirely c ut off the supplyV of air at this point. However, as a rule it will be open.

IIO

The term fuel-magazine as used throughout this description and Ithe claims is intended to refer to a fuel-magazine, 'as generally understood, or to a fire-pot. i

Having thus described my invention, what I claim is 1. A stove comprising a casing, a fuel-chamber, amain exit-flue, a series of tubes for introducing j'ets of air through the fuel under the influence of the draft, a plurality of auxiliary flues communicating with each other at one end, and at their opposite end with the maineXit-flue, a damper in saidv flue to`cut off the main exit-due from the fuel-chamber to direct the products of combustion passing to the exit-flue through the plurality of'auxiliary lues,an air-heating chamber interposed between the casing and the plurality of auxiliary flues, and fines connecting said chamber and the tubes as described.

2. A stove comprisin g a casing, a f nel-chamber, a main exit-flue, a series of tubes arranged to deliver jets of air below thc bed of the fuel, a plurality of auxiliary flues communicating with each other at one end,'and at their opposite ends with the main exit-flue, a damper in said flue to cutoff the main exitflue from the combustion-chamber to direct the products of combustion passing to the exit-flue through the plurality of auxiliary flues, a hot-air-supply chamber in proximity to the main exit-flue and the pluralityof aux iliary fiues, and means connected to said hotair chamber forsupplying jets of heated air to the fuel-chamber, substantially as described.

3. A stove comprising a casing a fuel-chamber, a main exit-flue, a plurality of auxiliary flues communicating with each other at one end, and at their opposite ends with the main exit-tine, a damper in said ue to cut off the.

main exit-flue from communication with the fuel-chamber to direct the products of combustion passing to the exit-flue through the plurality of auxiliary fines, a hot-air-supply chamber in proximity to the main exit-flue and the plurality of auxiliary fines, means connected to said hot-air chamber for supplying a series of currents of heated air to the fuel-chamber in various places, and-means also connected to the air-heating chamber for delivering` jets of heated air to the fuel substantially as set forth.

4. Astove comprisinga casing, a fuel-chamber, a main exit-flue, a hot-air-supply chainber, a superheaterhaving perforated protuberances within the fuel-chamber, a hot-air chamber 'communicating with said -superheater, andfines connecting the hot-air-supply chamber and the hot-air chamber communicating. with the superheater, substantially as described.

5. Astovecomprisingacasing,afuelcham ber, a pendent air-duct, a main exit-flue, a hot-air-supply chamber, flues connecting the hot-air-supply chamber and the air-duct, a

superheater having perforated protuberances within the fuel-chamber, a hot-air chamber communicating with said supcrheater, and flues connecting the lhot-air-supply chamber and the hot-air chamber communicating with the snperheater, substantially as described.

6. Astove comprisinga casing,afuelcham ber, a pendent air-duct, a main exit-flue, a hotair-supply chamber, flues connectingthe hot-air-supply chamber and the air-duct, perforated hollow linings in said fuel-chamber, flues connecting said hollow portions of said linings with the hot-air-supply chamber, a superheater having perforated protuberances within the-fuelchamber, a hot-air chamber communicating with said chamber, and fluespipes or flues leading from said chamber and communicating respectively with the air-duct, superheater and hollow lining, substantially as set forth.

8. A stove comprising a casing,a fuel-chamber, having a hollow lining, a pendent airduct, provided with means for delivering currents of heated air to the fuel, a main exit-flue,

a superheatcr having perforated protuberber, a pendent air-duct, a mainl exit-flue, a

plurality of auxiliary nues communicating with said exit-tlue, a commingling-chamber at the bottom of said exit-due with which said auxiliary dues communicate, a damper adapted to shut off direct communication bctween the central auxiliary flue and the main flue, to direct the products of combustion passing to the chimney to traverse -the plurality of'auxiliary flues, in combination with an air-heating chamber interposed between the casingand the flues and means coperating therewith for delivering through the fuelbed currents of heated air from the air-heating chamber, said air-currents beingdrawn through said fuel, under the influence of the draft. A

l0. A stove comprising acasing, a fuel'- chamber, a pendent air-duct, a mainy exit flue, a dam per, means coactingwith said damper-whereby the products of combustion are deected and separated and again brought IOO IOS

together before said products of combustion leave the stove, in combination with an airheating chamber interposedbetweenthe casing and the nues, and means cooperating therewith for delivering throughthe fuel-bed currents ofl heated air from the air-heating chamber, said air currents being drawn through said fuel under the influence of the draft. A

11. A stove comprising a casing, a fuelchamber, having a perforated hollow lining, a pendent' air-duct,.a main exit-due, super'- heater, perforated hollow protuberances, a damper vin said superheater, an air-heating supply-chamber, pipes or filles connecting said chamber with the hollow lining, the superheater and the air-duct, a plurality of auxiliary flues communicating with said main flue, a commingling-chamber at the bottom of said auxiliary dues, and a damper for cut-v ting off the central auxiliary flue from direct connection with the main flue, substantially as described.

12. A stove comprising a casinga fuel-magaits walls, removable means in the lower end IIO rear of the same, an .air-heating chamber po- Sitioned to be heated as the products pass through said flue, and means communicating with said chamber for delivering currents ol heated air to the fuel.

14. A stove comprising a casing, a fuelmagazine, a chamber above the fuel, an airduet, a flue in rear of the saine for the escape of the products of combustion, said Hue also connecting with the fuel-magazine, an airheating chamber positioned to be heated as the products pass through said Hue, and means communicating With said chamber for delivering two sets of currents of heated air to the fuel, one set of said currents of air being delivered to the air-chamber and thence to and through the fuel from the top, While the other set of air-currents are delivered to the' air-duct and thence through the fuel from below the top.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

v EDWIN R. CAHOONE.

l/Vitnesses:

GEO. E. FRECH, WALTER A. WILLIAMS. 

